I think that Rogers is doing the best at handling growth. There is a lot of new development there, and it seems that the traffic is not too horrible. It seems easy enough to get from one major area of town to another. I don't spend a lot of time in Benton County, but it seems that they have a better hold on the planning for sprawl. Fayettevile seems to always be one step behind. They try to fix a problem instead of prevent it in the first place. Springdale is the worst by far. Thompson is always a nightmare and 412 is as bad as a train wreck. Don Tyson is a great idea that should have been done years ago.
Honestly, from a traffic flow standpoint, the planning around all of NWA really baffles me. We came from a city with 1M people and the traffic was not nearly as bad. The cities were laid out in a grid, and the roads were all at least 4 lanes in each direction. Every intersection had at least 4 main lanes and 4 turn lanes (two in each direction).
The city was ugly, but effective. NWA is such a pretty place, and I really like driving though greenspace to get from one place to another, but the meandering two lane roads are not good for traffic. I hope that all the city planners can grow the city but keep the natural state charm.